Cover for a gas cap



FIG. 1 is a perspective view of the cover for a gas cap;

FIG. 2 is a front elevational view of the cover for a gas cap;

FIG. 3 is a side elevational view of the cover for a gas cap;

FIG. 4 is a side elevational view taken at 90 degrees to FIG. 3; and,

FIG. 5 is a rear elevational view of the cover for a gas cap. 

The ornamental design for a cover for a gas cap, as shown. 